comb_1 asin
comb_2 cos
comb_3 cubert
comb_4 asinh
comb_5 square
comb_6 tan
comb_7 sin
comb_8 atanh
comb_9 exp
comb_10 log
comb_11 sqrt
comb_12 acos
comb_13 tanh
comb_15 lin
comb_16 atan
comb_17 cube
comb_18 acosh